GNGTS 2022 - Atti del 40° Convegno Nazionale

466 GNGTS 2022 Sessione 3.2 Conclusions. The bridges and viaducts monitoring in recent decades has become essential in order to securing the major infrastructures. Thus, a combined analysis is crucial to identify cables and relative difectologies. The combined analysis between GPR and ultrasonic tomography provided good results about it. The GPR survey allows to correctly locate the cable along the beam length; ultrasonic tomography, carried out along the entire length beam, allows to identify any defects. More specifically, the UT methodologies allows to identify anything that affects the integrity of cables, for example non-injected cables, cables with voids, cables affected by oxidation and corrosion processes and cables injected but embedded in damaged concrete. References Alberghina M.F., Capizzi P., Schiavone S.; 2013: Tecniche non invasive di superficie e di volume per il monitoraggio strutturale delle sculture marmoree. AIPnD - PnD Congresso 2013, Oct 23-26, Trieste, Italy. Capizzi P., Cosentino P., Schiavone S.; 2011: La tomografia ad ultrasuoni per lo studio diagnostico dei beni culturali . AIPnD - PnD Congresso 2011 Oct 26-28, Florence, Italy. Ferrarella G.; 2021: Il degrado e la corrosione negli elementi in c.a. e c.a.p.. Ed. I (01-2021). Gorzelanczyk T., Hola J., Schabowicz K.; 2012: Nondestructive tests aimed at determining the thickness of the concrete shell of a heat pipe carrying tunnel. 18th World Conference on Nondestructive Testing, 16-20 April 2012, Durban, South Africa. Krause M., Gräfe B., Mielentz F., Milmann B., Friese M., Wiggenhauser H.; 2009: Ultrasonic imaging of post-tensioned concrete elements: New techniques for reliable localization of grouting defects . 2nd International Conference on Concrete Repair, Rehabilitation and Retrofitting, Concrete Repair, Rehabilitation, and Retrofitting II, Cape Town, South Africa, 2009, pp. 215-216. Hoegh K., Khazanovich L., Yu H.T.; 2011: Ultrasonic Tomography Technique for Evaluation of Concrete Pavements . Transportation Research Record: Journal of the Transportation Research Board, No. 2232, pp. 85–94. Samokrutov A.A., Kozlov V.N., Shevaldykin V.G.; 2006: Ultrasonic testing of concrete objects using dry acoustic contact. Methods, instruments and possibilities . The 5th International Conference “Non-Destructive Testing and Technical Diagnostics in Industry”. Mashinostroenie, Moscow, Russia, p.152. Schabowicz K.: Modern acoustic techniques for testing concrete structures accessible from one side only . Archives of Civil and Mechanical Engineering, 2015, 15 (4), pp. 1149-1159. Taffe A., Wiggenhauser H.; 2006: Validation for thickness measurement in civil engineering with ultrasonic echo . Proc. of the 9th European Conference on Nondestructive Testing, September, 2006, Berlin, Germany. BB 103-CD, Th. 2.5.3. White J., Hurlebaus S., Shokouhi P., Wimsatt A.; 2014: Use of Ultrasonic Tomography to Detect Structural Impairment in Tunnel Linings Validation Study and Field Evaluation. Transportation Research Record: Journal of the Transportation Research Board. 2407: 20–31.